CN103936215A - Heavy metal zero discharge system of electroplating rinse water, and recovery method of rinse water - Google Patents
Heavy metal zero discharge system of electroplating rinse water, and recovery method of rinse water Download PDFInfo
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- CN103936215A CN103936215A CN201410069751.9A CN201410069751A CN103936215A CN 103936215 A CN103936215 A CN 103936215A CN 201410069751 A CN201410069751 A CN 201410069751A CN 103936215 A CN103936215 A CN 103936215A
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Abstract
The invention relates to the technical field of wastewater recovery, and discloses a heavy metal zero discharge system of electroplating rinse water. The heavy metal zero discharge system comprises a pretreated rinse water treatment system, a second rinse water treatment system and/or a third rinse water treatment system which are arranged in parallel, and the pretreated rinse water treatment system is used for rinsing pretreated rinse water, neutralizing, filtering, evaporating, discharging the obtained evaporation concentrate into a sewage treatment station, and discharging flash evaporation water generated in the evaporation process and ultra-filtered water generated in the filtration process into a collection device; and the second rinse water treatment system and/or the third rinse water treatment system are/is used for rinsing rinse waters, evaporating, respectively recovering the obtained evaporation concentrates, discharging flash evaporation water generated in the evaporation process into the collection device, carrying out ion exchange and ultraviolet sterilization together, and recycling the obtained ion-exchanged and ultraviolet-sterilized solution. The invention also relates to a recovery method of the rinse water. In the invention, the utilization rate of the electroplating rinse water is improved, the discharge of the electroplating rinse water is reduced, and the treatment cost is reduced.
Description
Technical field
The present invention relates to waste water reclamation technical field, particularly relate to the recovery method of a kind of electroplating rinse water heavy metal Zero discharging system and rinse water.
Background technology
Electroplating assembly line is before electroplating, the cleaning that first needs to carry out plating piece carries out the pre-treating technology of plating piece, after the surface cleaning of plating piece is clean, sometimes need plating piece to carry out centre electroplating processes, the last metal that just plates outside surface, for example before chromium plating, need first nickel plating, ability chromium plating after nickel plating completes; Also some electroplating technology, after pre-treatment, can directly plate required metal at workpiece surface, for example zinc-plated.
In prior art, electroplating assembly line rinse water are to be all directly discharged in sewage works and to process conventionally, but its cost with electroplate liquid raises, the water consumption of production line is large, sewage load large, sewage works takes up an area wide, construction, the operation and maintenance cost of sewage plant be high, be unfavorable for the shortcomings such as environmental protection also not occurring the effective way addressing this problem at present.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is how to improve the utilization ratio of electroplate liquid, reduces the discharge of electroplating rinse water and reduces processing costs.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of electroplating rinse water heavy metal Zero discharging system, it comprises the pre-treatment rinse water treatment system, the second rinse water treatment system and/or the 3rd rinse water treatment system that are set up in parallel, after rinsing, neutralization, filtration and the evaporation of described pre-treatment rinse water treatment system for pre-treatment rinse water, evaporation dope is entered to sewage works, and the ultrafiltration water of the flash distillation water producing in evaporative process and filtration generation is entered to collection device; Described the second rinse water treatment system and/or the 3rd rinse water treatment system are for after carrying out rinse water rinsing separately, evaporation, to evaporate dope reclaims separately, and the flash distillation water producing in evaporative process is entered to described collection device, and concentrate and carry out ion-exchange and ultra-violet sterilization, and the solution after ion-exchange and ultra-violet sterilization is unified to recycle.
Wherein, described pre-treatment rinse water treatment system comprises the first rinsing device, neutralizing well, ultra-filtration equipment, ultrafiltration dope storage tank and the pre-treatment vaporizer that connect in turn, the ultrafiltration dope outlet of described ultra-filtration equipment is connected with the ultrafiltration dope entrance of described ultrafiltration dope storage tank, the ultrafiltration water out of described ultra-filtration equipment is all connected with described collection device with the flash distillation water out of vaporizer with pre-treatment, and described pre-treatment is linked into sewage works with the evaporation dope outlet of vaporizer by pipeline.
Wherein, described pre-treatment rinse water treatment system also comprises acid storage tank, and described acid storage tank is connected with described neutralizing well by pipeline.
Wherein, described the second rinse water treatment system comprises the first plating tank, the second rinsing device, the second heavy metal rinse water concentration tank and the second plating vaporizer, described the second rinsing device is connected with the second heavy metal rinse water concentration tank, described the second heavy metal rinse water concentration tank and the second plating are connected by pump is two-way with vaporizer, described the second heavy metal rinse water concentration tank is also connected with described the first plating tank, and described the second plating is connected with described collection device with the flash distillation water out of vaporizer.
Wherein, described the 3rd rinse water treatment system comprises the second plating tank, the 3rd rinsing device, triple-heavy metal rinse water concentration tank and the 3rd plating vaporizer, described the 3rd rinsing device is connected with triple-heavy metal rinse water concentration tank, described triple-heavy metal rinse water concentration tank and the 3rd plating are connected by pump is two-way with vaporizer, described triple-heavy metal rinse water concentration tank is also connected with described the second plating tank, and described the 3rd plating is connected with described collection device with the flash distillation water out of vaporizer.
Wherein, described collection device is flash distillation water ultrafiltration water storage tank.
Wherein, described the second heavy metal rinse water concentration tank is connected with the first plating tank with pipeline by pump and/or described triple-heavy metal rinse water concentration tank is connected with the second plating tank by porous ceramics purifying.
Wherein, the exit end of described flash distillation water ultrafiltration water storage tank is connected with active carbon filtering device, ion-exchange unit, deionized water storage tank and ultraviolet sterilization apparatus in turn, and finally connects rinse water retrieving arrangement.
Wherein, in described deionized water storage tank, be provided with the conductivitimeter for detection of electrical conductivity of solution in tank.
Wherein, in described the second heavy metal rinse water concentration tank and/or triple-heavy metal rinse water concentration tank, be respectively equipped with the photovoltaic principals on-line analysis device for detection of strength of solution.
Wherein, in described ultrafiltration dope storage tank, flash distillation water ultrafiltration water storage tank, the second heavy metal rinse water concentration tank and/or triple-heavy metal rinse water concentration tank, be respectively equipped with liquidometer.
Wherein, this system also comprises PLC Controlling System, and described PLC Controlling System is for controlling the start and stop of whole system.
The present invention also provides a kind of rinse water recovery method for the electroplating rinse water heavy metal Zero discharging system as described in technique scheme, and it comprises the steps:
(1) the pre-treatment rinse water of electroplating assembly line are discharged in neutralizing well through after the rinsing of the first rinsing device, and from acid storage tank, add acid solution in described neutralizing well, with the pH value of adjusting pre-treatment rinse water to being neutral;
(2) adjust after the pH value of pre-treatment rinse water, twitch pre-treatment rinse water in ultra-filtration equipment by pump and pipeline, through after the filtration of described ultra-filtration equipment, the ultrafiltration dope of formation is delivered in ultrafiltration dope storage tank;
(3) monitoring of the liquidometer in described ultrafiltration dope storage tank liquid level, when liquid level reaches behind the high liquid level position of setting, PLC controls pre-treatment and starts working with vaporizer;
(4) the flash distillation water being gone out by evaporator evaporation by pre-treatment with through ultra-filtration equipment filter after ultrafiltration water together be stored in flash distillation water ultrafiltration water storage tank, described pre-treatment is discharged into sewage works with the evaporation dope in vaporizer;
(5) being discharged in the second heavy metal rinse water concentration tank after the rinsing through the second rinsing device containing heavy metal rinse water of electroplating assembly line, liquidometer monitoring liquid level in described the second heavy metal rinse water concentration tank, after the liquid level in the second heavy metal rinse water concentration tank reaches the high liquid level position of setting, PLC controls the second plating vaporizer and starts working;
(6) the flash distillation water being gone out by evaporator evaporation by the second plating is stored in flash distillation water ultrafiltration water storage tank, and described second electroplates and turn back in the second heavy metal rinse water concentration tank with the evaporation dope in vaporizer, and circulating and evaporating always;
(7) through after a period of time, when the second heavy metal rinsing evaporation of water dope detects and reaches after desired concn through photovoltaic principals on-line analysis device, described the second plating evaporator stops operation;
The evaporation dope of (8) second heavy metal rinse water concentration tanks uses pump and pipeline to add in the first plating tank and recycles;
(9) in the time comprising another kind of heavy metal in the rinse water of this electroplating assembly line, described blowdown system comprises the 3rd described rinse water treatment system, after the rinsing of the rinse water that contain another kind of heavy metal through the 3rd rinsing device, be discharged in triple-heavy metal rinse water concentration tank, liquidometer monitoring liquid level wherein, after the liquid level in triple-heavy metal rinse water concentration tank reaches the high liquid level position of setting, PLC controls the 3rd plating vaporizer and starts working;
(10) electroplate by the 3rd the flash distillation water going out by evaporator evaporation and be stored in flash distillation water ultrafiltration water storage tank, the described the 3rd electroplates and turns back in triple-heavy metal rinse water concentration tank with the evaporation dope in vaporizer, and circulating and evaporating always;
(11) through after a period of time, when this heavy metal rinsing evaporation of water dope detects and reaches after set concentration through photovoltaic principals on-line analysis device, described the 3rd plating evaporator stops operation;
The evaporation dope of (12) triple-heavy metal rinse water concentration tanks uses pump and pipeline to add in the second plating tank and recycle after porous ceramics purifying purifies;
(13) set after liquid level when the liquid in flash distillation water ultrafiltration water storage tank reaches as required, by pump and Pipeline transport and after active carbon filtering device and ion exchange unit purify, be stored in deionized water storage tank;
(14) rinse water in described deionized water storage tank adopt pump and Pipeline transport to enter the recovery of rinse water retrieving arrangement after ultraviolet sterilization apparatus sterilization.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages:
The recovery method of a kind of electroplating rinse water heavy metal Zero discharging system provided by the invention and rinse water, this blowdown system comprises pre-treatment rinse water treatment system, the second rinse water treatment system and/or the 3rd rinse water treatment system, after processing through the rinsing of each treatment system, concentrate and carry out ion-exchange and ultra-violet sterilization, and the solution after ion-exchange and ultra-violet sterilization is unified to recycle, having realized the trace discharge of pre-treatment rinse water and the zero release of heavy metal rinse water is without sewage discharge, free from environmental pollution, be beneficial to environmental protection, reduce the running cost of enterprise simultaneously.
Brief description of the drawings
Fig. 1 is the process flow sheet of a kind of electroplating rinse water heavy metal of the present invention Zero discharging system.
In figure: 1: the first rinsing device; 2: acid storage tank; 3:PH meter; 4: liquidometer; 5: neutralizing well; 6: ultra-filtration equipment; 7: ultrafiltration dope storage tank; 8: pre-treatment vaporizer; 9: sewage works; 10: the second rinsing devices; 11: nickel rinse water concentration tank; 12: nickel plating vaporizer; 13: nickel bath; 14: the three rinsing devices; 15: chromium rinse water concentration tank; 16: chromium plating vaporizer; 17: flash distillation water ultrafiltration water storage tank; 18: porous ceramics purifying; 19: chrome-plating bath; 20: active carbon filtering device; 21: ion-exchange unit; 22: deionized water storage tank; 23: ultraviolet sterilization apparatus; 24: rinse water retrieving arrangement.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance is used for illustrating the present invention, but is not used for limiting the scope of the invention.
In description of the invention, it should be noted that, term " first ", " second ", " the 3rd " etc. are only for describing object, and can not be interpreted as instruction or hint relative importance.
The invention provides a kind of electroplating rinse water heavy metal Zero discharging system, it comprises the pre-treatment rinse water treatment system, the second rinse water treatment system and/or the 3rd rinse water treatment system that are set up in parallel, after rinsing, neutralization, filtration and the evaporation of described pre-treatment rinse water treatment system for pre-treatment rinse water, evaporation dope is entered to sewage works, and the ultrafiltration water of the flash distillation water producing in evaporative process and filtration generation is entered to collection device; Described the second rinse water treatment system and/or the 3rd rinse water treatment system are for after carrying out rinse water rinsing separately, evaporation, to evaporate dope reclaims separately, and the flash distillation water producing in evaporative process is entered to described collection device, and concentrate and carry out ion-exchange and ultra-violet sterilization, and the solution after ion-exchange and ultra-violet sterilization is unified to recycle.
With two embodiment, the present invention is described below:
Embodiment mono-
Taking the rinse water recovery system of chromium plating production line as example:
As shown in Figure 1, it comprises the pre-treatment rinse water treatment system, nickel rinse water treatment system and the chromium rinse water treatment system that are set up in parallel, after rinsing, neutralization, filtration and the evaporation of described pre-treatment rinse water treatment system for pre-treatment rinse water, evaporation dope is entered to sewage works 9, and the ultrafiltration water of the flash distillation water producing in evaporative process and filtration generation is entered to collection device; After described nickel rinse water treatment system and chromium rinse water treatment system are respectively used to carry out rinse water rinsing separately, evaporation, to evaporate dope reclaims respectively separately, and the flash distillation water producing in evaporative process is entered to described collection device, carry out in the lump ion-exchange and ultra-violet sterilization, and the solution after ion-exchange and ultra-violet sterilization is unified to recycle.Its zero release that has realized the trace discharge of pre-treatment rinse water and nickel, chromium rinse water is without sewage discharge, free from environmental pollution, be beneficial to environmental protection, reduces the running cost of enterprise simultaneously.
Described pre-treatment rinse water treatment system comprises the first rinsing device 1 connecting by pipeline in turn, neutralizing well 5, ultra-filtration equipment 6, ultrafiltration dope storage tank 7 and vaporizer 8 for pre-treatment, in described ultra-filtration equipment 6, be provided with ultra-filtration membrane, in the time that pre-treatment rinse water pass through the ultra-filtration membrane in described ultra-filtration equipment 6, micromolecular pure water can form ultrafiltration water by ultra-filtration membrane, and macromolecular impurity cannot pass through ultra-filtration membrane as metal ion, assemble and form ultrafiltration dope, the ultrafiltration dope outlet of described ultra-filtration equipment 6 is connected with the ultrafiltration dope entrance of described ultrafiltration dope storage tank 7, ultrafiltration dope is entered in described ultrafiltration dope storage tank 7, the ultrafiltration water out of described ultra-filtration equipment 6 is all connected with described collection device with the flash distillation water out of vaporizer 8 with pre-treatment, described pre-treatment is linked into sewage works 9 with vaporizer 8 by pipeline.Described pre-treatment rinse water treatment system also comprises acid storage tank 2, described acid storage tank 2 is connected with described neutralizing well 5 by pipeline, be used for entering acid solution in described neutralizing well 5, to carry out the adjustment of pH value, in described neutralizing well 5, be provided with PH meter 3, so that the pH value of observing at any time solution is to reach the object of neutralization.
In order to observe at any time the strength of solution of nickel, chromium rinse water, in described nickel rinse water concentration tank 11 and chromium rinse water concentration tank 15, be respectively equipped with the photovoltaic principals on-line analysis device for detection of strength of solution.
Described nickel rinse water treatment system comprises nickel bath 13, the second rinsing device 10, nickel rinse water concentration tank 11 and vaporizer 12 for nickel plating, described the second rinsing device 10 is connected with nickel rinse water concentration tank 11, described nickel rinse water concentration tank 11 and nickel plating with vaporizer 12 by motor-mount pump or pneumatic pump and coordinate magnetic valve or pneumavalve is two-way is connected, so that the concentration that detects nickel concentrated solution at photovoltaic principals on-line analysis device is carried out circulating and evaporating while not reaching requirement, described nickel rinse water concentration tank 11 is also connected with described nickel bath 13, recycle for the nickel concentrated solution that reaches concentration requirement being discharged into described nickel bath 13, described nickel plating is connected with described collection device with the flash distillation water out of vaporizer 12.
Described chromium rinse water treatment system comprises chrome-plating bath 19, the 3rd rinsing device 14, chromium rinse water concentration tank 15 and vaporizer 16 for chromium plating, described the 3rd rinsing device 14 is connected with chromium rinse water concentration tank 15, described chromium rinse water concentration tank 15 and chromium plating with vaporizer 16 by motor-mount pump or pneumatic pump and coordinate magnetic valve or pneumavalve is two-way is connected, so that the concentration that detects chromium concentrated solution at photovoltaic principals on-line analysis device is carried out circulating and evaporating while not reaching requirement, described chromium rinse water concentration tank 15 is also connected with described chrome-plating bath 19, recycle for the chromium concentrated solution that reaches concentration requirement being discharged into described chrome-plating bath 19, evaporation for described chromium plating, 16 flash distillation water out is connected with described collection device.
Described collection device is flash distillation water ultrafiltration water storage tank 17, for described pre-treatment, the ultrafiltration water out of vaporizer 8, ultra-filtration equipment 6, nickel plating are all connected with described flash distillation water ultrafiltration water storage tank 17 by pipeline with vaporizer 12 and chromium plating vaporizer 16, and the ultrafiltration water for flash distillation water that evaporative process is produced and after being filtered by ultra-filtration equipment 6 is stored in described flash distillation water ultrafiltration water storage tank 17.
Described chromium rinse water concentration tank 15 is connected with chrome-plating bath 19 by porous ceramics purifying 18, described porous ceramics purifying 18 has antibacterial preservative activity, bacterium in water, subparticle impurity, virus etc. effectively can be removed, there is good filtration, purification effect.
The exit end of described flash distillation water ultrafiltration water storage tank 17 is connected with active carbon filtering device 20 in turn, ion-exchange unit 21, deionized water storage tank 22 and ultraviolet sterilization apparatus 23, and finally connect rinse water retrieving arrangement 24, in the time being stored in the liquid level of mixing solutions of flash distillation water in described flash distillation water ultrafiltration water storage tank 17 and ultrafiltration water and reaching necessary requirement, filtration by pump extracting liquid through active carbon filtering device 20, and after the ion-exchange of ion-exchange unit 21, be stored in deionized water storage tank 22, in described deionized water storage tank 22, be provided with the conductivitimeter for detection of electrical conductivity of solution in tank, detect the specific conductivity of solution by conductivitimeter, in the time that specific conductivity is qualified, after the sterilization of liquid in deionized water storage tank 22 through ultraviolet sterilization apparatus 23, enter rinse water retrieving arrangement 24, when specific conductivity high to automatic alarm after certain numerical value, alert cleaning active charcoal filtration unit 20 and ion-exchange unit 21, wherein, described ion-exchange unit 21 is provided with two covers, to accomplish a preparation and a use.
In described ultrafiltration dope storage tank 7, nickel rinse water concentration tank 11, chromium rinse water concentration tank 15 and flash distillation water ultrafiltration water storage tank 17, be respectively equipped with liquidometer 4, so that check at any time the liquid level in each tank.
This system also comprises PLC Controlling System, and described PLC Controlling System can be by the start and stop of computer monitoring system or touch-screen control whole system, for example, control the opening and closing operation of each pump.
In addition, comprise the steps for the rinse water recovery method of chromium plating production line, following some step can be carried out simultaneously, and nonessentially carries out according to time order and function order:
(1) the pre-treatment rinse water of chromium plating production line are discharged in neutralizing well 5 after the rinsing through the first rinsing device 1, and from acid storage tank 2, add acid solution in described neutralizing well 5, be neutral to adjust pH value to the solution of pre-treatment rinse water;
(2) adjust after the pH value of pre-treatment rinse water, twitch pre-treatment rinse water in described ultra-filtration equipment 6 by pump and pipeline, through after the filtration of described ultra-filtration equipment 6, the ultrafiltration dope of formation is delivered in ultrafiltration dope storage tank 7;
(3) liquidometer 4 in described ultrafiltration dope storage tank 7 is monitored liquid level, and when liquid level reaches behind the high liquid level position of setting, PLC controls pre-treatment and starts working with vaporizer 8;
(4) the flash distillation water being evaporated with vaporizer 8 by pre-treatment and after ultra-filtration equipment 6 filters the ultrafiltration water of relative clean be stored in flash distillation water ultrafiltration water storage tank 17, described pre-treatment is discharged into sewage works 9 with the evaporation dope of the pettiness amount of vaporizer 8;
(5) after the rinsing of the nickeliferous rinse water of chromium plating production line through the second rinsing device 10, be discharged in nickel rinse water concentration tank 11, liquidometer 4 in described nickel rinse water concentration tank 11 is monitored liquid level, after the liquid level in nickel rinse water concentration tank 11 reaches the high liquid level position of setting, PLC controls nickel plating and starts working with vaporizer 12;
(6) the flash distillation water being evaporated with vaporizer 12 by nickel plating is stored in flash distillation water ultrafiltration water storage tank 17, and nickel plating turns back in nickel rinse water concentration tank 11 with the evaporation dope in vaporizer 12, circulating and evaporating always;
(7) through after a period of time, nickel rinsing evaporation of water dope detects and reaches after desired concn through photovoltaic principals on-line analysis device, and nickel plating quits work with vaporizer 12;
(8) the evaporation dope of nickel rinse water concentration tank 11 uses motor-mount pump or pneumatic pump and pipeline to add reuse in nickel bath 13 to;
(9) being discharged in chromium rinse water concentration tank 15 after the rinsing through the 3rd rinsing device 14 containing chromium rinse water of chromium plating production line, liquidometer 4 is wherein monitored liquid level, after the liquid level in chromium rinse water concentration tank 15 reaches the high liquid level position of setting, PLC controls chromium plating and starts working with vaporizer 16;
(10) the flash distillation water being evaporated with vaporizer 16 by chromium plating is stored in flash distillation water ultrafiltration water storage tank 17, and chromium plating turns back in chromium rinse water concentration tank 15 with the evaporation dope in vaporizer 16, circulating and evaporating always;
(11) through after a period of time, chromium rinsing evaporation of water dope detects and reaches after set concentration through photovoltaic principals on-line analysis device, and chromium plating quits work with vaporizer 16;
(12) the evaporation dope of chromium rinse water concentration tank 15 uses motor-mount pump or pneumatic pump and pipeline to add reuse in chrome-plating bath 19 to after porous ceramics purifying 18 purifies;
(13) when flash distillation water ultrafiltration water storage tank 17 as required or arrive after certain liquid, become high-quality rinse water by motor-mount pump or pneumatic pump and Pipeline transport and after active carbon filtering device 20 and ion exchange unit purify, be stored in deionized water storage tank 22;
(14) rinse water in described deionized water storage tank 22 adopt motor-mount pump or pneumatic pump and pipeline to enter rinse water retrieving arrangement 24 after ultraviolet sterilization apparatus 23 sterilizations to reclaim.
Embodiment bis-
Taking the rinse water recovery system of galvanization production line as example:
The difference of the present embodiment and embodiment mono-is only: the rinse water recovery system of galvanization production line only comprises pre-treatment rinse water treatment system and zinc rinse water treatment system, rinse water treatment system in the middle of not needing, owing to also needing first nickel plating before chromium plating, therefore zinc-platedly on treatment process, omit an art breading step than chromium plating.
The present invention is mainly used in the higher heavy metal platings of hazardness such as chromium plating, cadmium plating, zinc-plated, cyanide electroplating.
The present invention has realized the trace discharge of pre-treatment rinse water and the zero release of heavy metal rinse water is without sewage discharge, free from environmental pollution, be beneficial to environmental protection, reduces the running cost of enterprise simultaneously.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an electroplating rinse water heavy metal Zero discharging system, it is characterized in that, it comprises the pre-treatment rinse water treatment system, the second rinse water treatment system and/or the 3rd rinse water treatment system that are set up in parallel, after rinsing, neutralization, filtration and the evaporation of described pre-treatment rinse water treatment system for pre-treatment rinse water, evaporation dope is entered to sewage works, and the ultrafiltration water of the flash distillation water producing in evaporative process and filtration generation is entered to collection device; Described the second rinse water treatment system and/or the 3rd rinse water treatment system are for after carrying out rinse water rinsing separately, evaporation, to evaporate dope reclaims separately, and the flash distillation water producing in evaporative process is entered to described collection device, and concentrate and carry out ion-exchange and ultra-violet sterilization, and the solution after ion-exchange and ultra-violet sterilization is unified to recycle.
2. electroplating rinse water heavy metal Zero discharging system as claimed in claim 1, it is characterized in that, described pre-treatment rinse water treatment system comprises the first rinsing device, neutralizing well, ultra-filtration equipment, ultrafiltration dope storage tank and the pre-treatment vaporizer that connect in turn, described pre-treatment rinse water treatment system also comprises acid storage tank, and described acid storage tank is connected with described neutralizing well by pipeline; The ultrafiltration dope outlet of described ultra-filtration equipment is connected with the ultrafiltration dope entrance of described ultrafiltration dope storage tank, the ultrafiltration water out of described ultra-filtration equipment is all connected with described collection device with the flash distillation water out of vaporizer with pre-treatment, and described pre-treatment is linked into sewage works with the evaporation dope outlet of vaporizer by pipeline.
3. electroplating rinse water heavy metal Zero discharging system as claimed in claim 2, it is characterized in that, described the second rinse water treatment system comprises the first plating tank, the second rinsing device, the second heavy metal rinse water concentration tank and the second plating vaporizer, described the second rinsing device is connected with the second heavy metal rinse water concentration tank, described the second heavy metal rinse water concentration tank and the second plating are connected by pump is two-way with vaporizer, described the second heavy metal rinse water concentration tank is also connected with described the first plating tank, described the second plating is connected with described collection device with the flash distillation water out of vaporizer.
4. electroplating rinse water heavy metal Zero discharging system as claimed in claim 3, it is characterized in that, described the 3rd rinse water treatment system comprises the second plating tank, the 3rd rinsing device, triple-heavy metal rinse water concentration tank and the 3rd plating vaporizer, described the 3rd rinsing device is connected with triple-heavy metal rinse water concentration tank, described triple-heavy metal rinse water concentration tank and the 3rd plating are connected by pump is two-way with vaporizer, described triple-heavy metal rinse water concentration tank is also connected with described the second plating tank, described the 3rd plating is connected with described collection device with the flash distillation water out of vaporizer, described collection device is flash distillation water ultrafiltration water storage tank.
5. electroplating rinse water heavy metal Zero discharging system as claimed in claim 4, it is characterized in that, described the second heavy metal rinse water concentration tank is connected with the first plating tank with pipeline by pump and/or described triple-heavy metal rinse water concentration tank is connected with the second plating tank by porous ceramics purifying.
6. electroplating rinse water heavy metal Zero discharging system as claimed in claim 5, it is characterized in that, the exit end of described flash distillation water ultrafiltration water storage tank is connected with active carbon filtering device, ion-exchange unit, deionized water storage tank and ultraviolet sterilization apparatus in turn, and finally connects rinse water retrieving arrangement; In described deionized water storage tank, be provided with the conductivitimeter for detection of electrical conductivity of solution in tank.
7. electroplating rinse water heavy metal Zero discharging system as claimed in claim 6, it is characterized in that, in described the second heavy metal rinse water concentration tank and/or triple-heavy metal rinse water concentration tank, be respectively equipped with the photovoltaic principals on-line analysis device for detection of strength of solution.
8. electroplating rinse water heavy metal Zero discharging system as claimed in claim 7, it is characterized in that, in described ultrafiltration dope storage tank, flash distillation water ultrafiltration water storage tank, the second heavy metal rinse water concentration tank and/or triple-heavy metal rinse water concentration tank, be respectively equipped with liquidometer.
9. electroplating rinse water heavy metal Zero discharging system as claimed in claim 1, is characterized in that, it also comprises PLC Controlling System, and described PLC Controlling System is for controlling the start and stop of whole system.
10. for a rinse water recovery method for the electroplating rinse water heavy metal Zero discharging system as described in claim 1-9 any one, it is characterized in that, comprise the steps:
(1) the pre-treatment rinse water of electroplating assembly line are discharged in neutralizing well through after the rinsing of the first rinsing device, and from acid storage tank, add acid solution in described neutralizing well, with the pH value of adjusting pre-treatment rinse water to being neutral;
(2) adjust after the pH value of pre-treatment rinse water, twitch pre-treatment rinse water in ultra-filtration equipment by pump and pipeline, through after the filtration of described ultra-filtration equipment, the ultrafiltration dope of formation is delivered in ultrafiltration dope storage tank;
(3) monitoring of the liquidometer in described ultrafiltration dope storage tank liquid level, when liquid level reaches behind the liquid level position of setting, PLC control pump quits work, and now pre-treatment is started working with vaporizer;
(4) the flash distillation water being gone out by evaporator evaporation by pre-treatment with through ultra-filtration equipment filter after ultrafiltration water together be stored in flash distillation water ultrafiltration water storage tank, described pre-treatment is discharged into sewage works with the evaporation dope in vaporizer;
(5) being discharged in the second heavy metal rinse water concentration tank after the rinsing through the second rinsing device containing heavy metal rinse water of electroplating assembly line, liquidometer monitoring liquid level in described the second heavy metal rinse water concentration tank, when the liquid level in the second heavy metal rinse water concentration tank reaches behind the liquid level position of setting, PLC controls the second plating vaporizer and starts working;
(6) the flash distillation water being gone out by evaporator evaporation by the second plating is stored in flash distillation water ultrafiltration water storage tank, and described second electroplates and turn back in the second heavy metal rinse water concentration tank with the evaporation dope in vaporizer, and circulating and evaporating always;
(7) through after a period of time, when the second heavy metal rinsing evaporation of water dope detects and reaches after desired concn through photovoltaic principals on-line analysis device, described the second plating evaporator stops operation;
The evaporation dope of (8) second heavy metal rinse water concentration tanks uses pump and pipeline to add in the first plating tank and recycles;
(9) in the time comprising another kind of heavy metal in the rinse water of this electroplating assembly line, described blowdown system comprises the 3rd described rinse water treatment system, after the rinsing of the rinse water that contain another kind of heavy metal through the 3rd rinsing device, be discharged in triple-heavy metal rinse water concentration tank, liquidometer monitoring liquid level wherein, after the liquid level in triple-heavy metal rinse water concentration tank reaches the liquid level position of setting, PLC controls the 3rd plating vaporizer and starts working;
(10) electroplate by the 3rd the flash distillation water going out by evaporator evaporation and be stored in flash distillation water ultrafiltration water storage tank, the described the 3rd electroplates and turns back in triple-heavy metal rinse water concentration tank with the evaporation dope in vaporizer, and circulating and evaporating always;
(11) through after a period of time, when this heavy metal rinsing evaporation of water dope detects and reaches after set concentration through photovoltaic principals on-line analysis device, described the 3rd plating evaporator stops operation;
The evaporation dope of (12) triple-heavy metal rinse water concentration tanks uses pump and pipeline to add in the second plating tank and recycle after porous ceramics purifying purifies;
(13) set after liquid level when the liquid in flash distillation water ultrafiltration water storage tank reaches as required, by pump and Pipeline transport and after active carbon filtering device and ion exchange unit purify, be stored in deionized water storage tank;
(14) rinse water in described deionized water storage tank adopt pump and Pipeline transport to enter the recovery of rinse water retrieving arrangement after ultraviolet sterilization apparatus sterilization.
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